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Preparation method of nitrogen-doped porous carbon foam material and application of nitrogen-doped porous carbon foam material in metal-air battery

A nitrogen-doped porous carbon and foam material technology is applied in fuel cell-type half-cells and secondary-battery-type half cells, battery electrodes, circuits, etc. Achieve the effect of rich pore structure, good mechanical and electrochemical properties, and excellent catalytic performance

Active Publication Date: 2017-01-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the introduction and removal of the template not only makes the preparation process more cumbersome, but also increases the production cost of the material.

Method used

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  • Preparation method of nitrogen-doped porous carbon foam material and application of nitrogen-doped porous carbon foam material in metal-air battery
  • Preparation method of nitrogen-doped porous carbon foam material and application of nitrogen-doped porous carbon foam material in metal-air battery
  • Preparation method of nitrogen-doped porous carbon foam material and application of nitrogen-doped porous carbon foam material in metal-air battery

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Weigh 5g of chitin and dissolve it in 5mL of water, mix and stir for 10min at a stirring speed of 300rpm until the solution is homogeneous and stable, and record it as beaker a; measure 50mL of concentrated sulfuric acid in beaker b, then slowly add concentrated sulfuric acid into beaker a In the process, until the amount of black solid is produced no longer increases. Pour the beaker with the black solid into a large beaker filled with water, filter and wash until the filtrate is neutral. The filtered black solid was put into a freeze dryer and dried for 12 hours.

[0035] The prepared material precursor was placed under an argon atmosphere, and the temperature was raised to 900° C. at a heating rate of 5° C. / min, and kept for 2 hours. The obtained material is the N-doped porous carbon foam material (see the SEM image in figure 1). figure 1 It can be seen that the synthesized material has a rich pore structure, figure 2 The EDS results show that the material conta...

Embodiment 2

[0040] Weigh 10g of chitin and dissolve it in 5mL of water. After mixing, stir at a stirring speed of 300rpm for 10min until the solution is uniform and stable, which is recorded as beaker a; measure 60mL of concentrated sulfuric acid into beaker b, and then slowly add concentrated sulfuric acid into beaker a In the process, until the amount of black solid is produced no longer increases. Pour the beaker with the black solid into a large beaker filled with water, filter and wash until the filtrate is neutral. The filtered black solid was put into a freeze dryer and dried for 12 hours.

[0041] The prepared material precursor was placed under an argon atmosphere, and the temperature was raised to 800° C. at a heating rate of 4° C. / min, and kept for 2 hours. The obtained material is N-doped porous carbon foam material, and its specific surface area reaches 1000 m 2 / g, N doping amount is 7%.

[0042] The catalyst material prepared in this embodiment is mixed with ethanol and ...

Embodiment 3

[0044] Weigh 10g of chitin and dissolve it in 10mL of water. After mixing, stir at a stirring speed of 500rpm for 10min until the solution is uniform and stable, which is recorded as beaker a; measure 50mL of concentrated sulfuric acid into beaker b, and then slowly add concentrated sulfuric acid into beaker a In the process, until the amount of black solid is produced no longer increases. Pour the beaker with the black solid into a large beaker filled with water, filter and wash until the filtrate is neutral. The filtered black solid was put into a freeze dryer and dried for 12 hours.

[0045] The prepared material precursor was placed under an argon atmosphere, and the temperature was raised to 700° C. at a heating rate of 5° C. / min, and kept for 2 hours. The obtained material is N-doped porous carbon foam material, and its specific surface area reaches 728m 2 / g, N doping amount is 5%.

[0046] The catalyst material prepared in this embodiment is mixed with ethanol and N...

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Abstract

The invention discloses a preparation method of a nitrogen-doped porous carbon foam material and application of the nitrogen-doped porous carbon foam material in a metal-air battery. The preparation method comprises the following steps of carrying out concentrated sulfuric treatment on an organic matter containing nitrogen and oxygen, and freeze drying to obtain a precursor; putting the precursor into a protective atmosphere, warming and carbonizing to obtain the nitrogen-doped porous carbon foam material with a porous foam structure, a large specific surface area, uniformity in nitrogen doping, a favorable mechanical property and a favorable electrochemical property. According to the application of the nitrogen-doped porous carbon foam material used as a catalyst in the metal-air battery, the nitrogen-doped porous carbon foam material has excellent catalytic performance, the air electrode polarization can be effectively reduced, and the discharge performance of the air battery is improved.

Description

technical field [0001] The invention relates to a preparation method of a nitrogen-doped carbon material, in particular to a preparation method of a nitrogen-doped porous carbon foam material and its application in metal-air batteries, belonging to the field of metal-air batteries. Background technique [0002] Energy is an important material basis for developing the national economy and improving people's living standards, and it is also an important factor that directly affects economic development. Since the beginning of the 21st century, problems such as resource shortage, environmental pollution, and greenhouse effect caused by traditional energy utilization methods have become increasingly prominent. Improving the energy structure and developing efficient and clean new energy sources has become a global consensus. Metal-air batteries are considered to be one of the most promising high-energy-density battery systems. A metal-air battery is a battery in which oxygen in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/96H01M12/08
CPCH01M4/88H01M4/96H01M12/08Y02E60/10
Inventor 张治安赖延清王麒羽方静李劼
Owner CENT SOUTH UNIV
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